Cutting mechanism for rotary printing machines



Jan. '1, 1935. M. MAHON CUTTING MECHANISM FOR ROTARY PRINTING MACHINESFiled NOV. 25, 1953 2 Sheets-Sheet 1 INVENTOR;

Jan. 1, 1935. M. MAHON CUTTING MECHANISM FOR ROTARY PRINTING MACHINESFiled Nov. 25, 1953 2 Sheets-Sheet 2 INVENTOR.

Patented Jan. 1, I935 1 I a 7 1,986,212 r CUTTING' MECHANISM FOR ROTARYi PRINTING MACHINES 1 H: v

Michael Mahon, Brooklyn, N. Y.,Vassignor to Irving Trust Company,temporary trustee for IhHoe & Inc.,'New York, N. Y;, acorporation of 1New York ApplicationNovember 25, 193s, Serial No. 699,739 12 Claims;(01. 164- 67) This invention in general relates tocutting and foldingmechanism for newspaper printing machines, and has for its object theprovision of an improved meansfor severing the associated webs which arecut andfolded to form the finished product. 7 p

A further object of the inyentionis to provide in a rotary cuttingmechanism a cylinder having novel knife actuating means mounted thereonand operated by engagement witha coacting cylinder. V j I I p.

It is also an object of the invention to provide a rotary web cuttingmechanism of generally improved construction, whereby thedevice will 1be, simple, durable and inexpensivein construction, as well asconveriientpractical, serviceable and efiicient in its use.

With the foregoing and other objects in view, which will appear as thedescription proceeds,

t e invent n r d s the combination a arrangement of parts, and in thedetails of construction hereinafter described and 'claimeda Thepreferred embodiment of jthe invention is illustrated "in theaccompanying drawings, wherein: H t

I Figure 1 is a fragmentary elevational view of a pair ofcoactingcutting and collectingcylin-fl ders in one of which anemhodirnent of'ithe invention has beenincorporated, and illustrating theposition of the cutting mechanism whenthe knifeis projected from thecylinder wherein samev is mounted; certain parts beingbroken away andothers shown insectionj Figure. 2 "is a fragmentary sectional view takenon the line and'as viewed in the direction of the arrow 20f Figurewl; av V in I Figure 3 is afrag'mentary' diagrammatic view showing theposition of the parts prior to the projection of the knife; T Figure 4is a view of the periphery of the cut ting cylinder as viewedin thedirectionof arrow 4 of Figure 3; and, v o Figure 5 is a sectional viewtaken on the line and as seenin the fdirectioniof the arrow 5 of Figure2.

In the drawings reference indicate corresponding parts in" the severalviews of the preferred form of the invention, 6 designate'sijafoldingcylinder and 7 a with the usual practice. A-cutting abutment 9;

s uita y s p ts niheiiqlq g rlin r a wherein similar characters ofcoacting cutting cylinder. The foldingi' cylinder 6 is provided with theusual sheettakin'g means" receives the knife or blade 10 of the cuttingcylinder 7, the said knife being actuated by mechanism fc irmi'ng thefeature of the present in vention 1 t 1 The knife 10 is arrangedbetweenand projects outwardly of apair of plates or blocks 11 longi-'tudinally positioned. in a carrier or holder 12 h c m u tan ial y o,u-sh -w figuration or channel. iron construction, the said knife andcheek blocks being held to "the carrier 12 by screws 13.. Thecarrier 12is in turn secured by screws 14 toabar 15, having cam edges 16, bestseenin Figure 2. The holder and the bar 15 ,are slidably mounted inapocketorf recess 17 formed in the body-portion of the cutting cylinder7f Each cam portionlfi of the ba r, 1'5 is in turn engaged byan arm orlug 18, formed on andadjacent member 19,, [pivoted on a shaft or stud'21' carried by' arms i 29 formed on a face block 30. The said faceblock 30and members carriedthereby are setv in the endia'ces of theaforesaid cylinder 7"an'd" secured thereto by the bolts 32" and screws32'. Each member" 191s also provided with ase'condar'mor lug 22oppositely. disposed to'tlielarm l'SIand adapted to be en-, gagedby aninner end of a plunger 23 arranged in a pocket or recess24formed in theface block 30. The plunger 23', as best shown'in Figure 2, is formedwith an annular .flangej25 engaged by one end of a spring 26 encirclingthe body por tion of the plungerf23, 7 the other end of the spring 26being seated against an inner wall' of the pocket 24 through which aportion of the plunger 23prot'rudes. By furtherjin'spe'ction of Figure2,]it will be seen thateach plunger 231s formed with 'alstem "or. tongue27 slidablyre-' pocket 24, and also to slidably'retain same thereinwhile permitting the tongue 27 to normally protrude exteriorly of the"cutting cylinder to the extent indicated in Figure 3.

' The knife 10 is normally maintained in retracted position by springs371, each of which fen circles 'a. projection oii's'tem'formed as apartof the'head of each screw 14. One endof the'spring' 31 is engagedagainsta projecting portion 34 of the aforesaid block 30, the other end of thesaid spring tbeing engaged against a projecting portion 35 formed onflthe j holder 12. It is to be] understood that the constructiondescribed above is provided "by dulplicatinglthe parts mechanismrelative to the cylinder is made and.

comprises a plurality of abutment screws 36 each of which engages anadjacenti's'temjz'l tolaotuatd' the knife. Each abutment screw 36 isadjustable in a tapped hole 37 in the cutting cylinder '2 v and may belocked by means fora-jam e ement; or plug 38 thrust intoengagement-therewith by a set screw 39. It will be observedthat when thecylinders are separated to out a heavier product, the abutmentscrews'may be backed out and locked in proper position soythatythe.knife will enter the cutting rubber the requisite distance to sever theproducts.

It will also be understoodthatin-cases where the products to be out are"of an invariable thickness not requiring a spacing or disposition ofthe cylinders-other than the jnormalgone illustrated, the abutment screw36* maybe dispensed with and the surface of the cylinder 6 made uniformor level with adjacent portions of its periphery in the conventional*manner, the outer extremity of the plunger stem 27 then'beingadapted'to directly contact thesurface of the cylinder 6 and 7 rotate. Iy

The function and general manner of operation of .the device may 'now besummarized as follows;

"' Assuming the; folding and cutting cylinders 6, 7 respectively, arerotating-in the direction indicated by the arrows of- Figure'l, itwillbe observed that as the stems or projections 2 of the plungers 23are engaged by the heads of the screws or abutments36 of the 'foldingcylinder 6, further angular movement offthe said cutting and; foldingcylinders thrust the plunger 23. inwardly, thereby: engaging the innermost end of same withan adjacent edge of y the arm 22, consequently;angling or "turning the member 22 about its pivot"2lflandfcngaging theoppositelydisposed arm 18 thereof with the' camedge 16 of the bar 'lfi.Further movement of the plunger" 23,.asthe cylinders 6 and 7 roe tate,will cause the knifelO to engage and sever the web W, which hasfheen.previously e ga ed yotherespe ti e Pins 8 ri8fa d ri asto whether. theproductfisa non-collected,

or collected one, it being understood thatwhen the pins 8 are acting fora non collected prod uqt, the pins '8' will be withdrawn and in theevent of a. collected) product,': the] pins 8, will. act to. take theproduct which is later transferred to the folding Cylinder in'accordancewith well known practice. As the folding andcutting cylinders continueto rotate, the plunger 23 will be projected out of the pocket 24, to theextent indicated in Figure 3, in which latter position, it is again.ready for engagement with theabutinent screw 36 or the'peripheryof thecollecting cylinder 6, in the manner described above while the knife 10is .retracted intojthe cutting cylinder'L It will be noted that bymeans-of the. present invention, the web severing knife is normally heldWith n the, Qlitting cylinder, but is quickly, and, forcibly proioctedat; the [proper time to most effectively make the cut."

as the two cylinders 6 It will be understood that the invention may beembodied in other specific forms without departing from the spirit oressential attributes thereof, and it is therefore desired that thepresent embodiment be considered in all respects as illustrative and,not, restrictivareference, being had to the appended claims rather thanto the foregoing description to indicate the -scope of the invention.What I claim is:

-; 1.. Ina deviceofthe character described, the

combination with coacting cylinders of a rotary printing machine; of aweb severing knife arrangedwithin 'one of 's'aid cylinders, and meansmounted on thecylinder having the knife and actuated by contact withmeans on another of the cylinders for operating said knife.

' 2.In a rotary cutting mechanism for a print- .ing machine, a firstcutting cylinder and a second cutting cylinder coacting therewith,acutting knife reciprocatingly mounted'in' a first cylinder'a'nd movableradially to the axis of said cylinderg'and actuating means normallyprojecting from said first cylinder and adapted to operate said knifewhen said actuating means is operated by engagement with means arrangedon a second cutting cylinder. v

3. Anfarrangement-as specified -in' claim 1 wherein the first mentionedmeans includes a member normally protruding from-the cylinder whereonthe said first mentioned meansare mounted.

4. An arrangement as specified in claim 1 wherein the first mentionedmeans includes a plunger normally protruding from the cylinder whereonthe said first mentioned fmeansoare mounted, a spring engaged with theplunger and resilient means for j normallymaintainingthe knife-withinthe last mentionedcylinder.

5; In a device of the character described, the combination withcoact-ing folding and cutting cylinders ofa rotary printinginachine offaknife reciprocatingly mounted in said cutting cylinder, plunger meansarranged in the cutting cylinder,

a member pivotally mounted within the cylinder and'adapted to be engagedthe plungermeans, means ,arrangedl between-the ,member and the knifewhereby when said plunger means is engag'ed by means secured to thefolding cylinder,

asyboth of said cylindersrotate, thelnelmberwill b jmoved and said knifewill be thru'stout of said cylinder; and resilient means for'normallymaintainingthe plunger means in position to be engaged by themeans's'ecured to the collecting cylinder;

6. In a rotary cutting and foldingnme'chanism,

the combinationof coacting 'cylinderalQne of said cylinders'having aknife s lidably mounted g 7. Ina device. of the character describedhaying folding 1 and cutting cylinders, a,knife slidably m iintedinthe'cuttingcylinder, means securedgto'said knife and coactingly engagedwith a member pivotally mounted in the cutting cylin der, resilientirileans normally maintaining said knife in contact withthe'm'emberfiand plunger means normally protruding out of the cuttingcylinder having an inner end engaged with said member, whereby when saidcutting and folding cylinders are rotated the plunger means will beengaged by the periphery of the folding cylinder and thrust inwardlythereby protruding said knife out of the cutting cylinder, and resilientmeans for returning the plunger means to the normal projected position.

8. In a device of the character described, the combination with cuttingand folding cylinders adapted to accommodate a web therebetween; of aWeb engaging knife, a bar fastened to said knife and engaged with amember rockingly mounted in the cutting cylinder, spring means normallymaintaining the bar in engagement with the member, plunger means alsoengaged with the member, and resilient means for normally maintainingone end of said plunger exteriorly of the cutting cylinder, whereby whenthe plunger is actuated by contact of the folding cylinder, the memberwill be rocked and the bar will engage the knife and thereby projectsame against the web interposed between the cutting and foldingcylinders.

9. In a device of the character described, the combination with a pairof cutting and folding cylinders, of a knife movably mounted in saidcutting cylinder, and means normally protruding exteriorly of saidcutting cylinder for actuating said knife independently of drivingmechanism and. parts connected to the driving mechanism for said cuttingand folding cylinder, whereby the knife may be actuated to sever a weband then automatically returned to position within the cutting cylinder.

10. In a device of the character described, the combination withcoactingcylinclers of a rotary printing machine; of a web severing knifeare ranged in one of the cylinders, an abutment on another of thecylinders, and means mounted on I said first mentioned cylinder andactuated by contact with said abutment for operating said knife to severa web.

11. The combination with coacting cylinders of a rotary printingmachine; of a web severing knife arranged in one of thecylinders, anabutment on another of the cylinders, means for adjusting the abutmentto various positions relatively to the periphery of the cylinder whereonsame is mounted, and other means mounted on the first mentioned cylinderand actuated by contact with-said abutment for operating said knife tosever a web.

. 12. The combination in a rotary printing machine, of a pair of 1cylinders, a web severing knife arranged within one of the cylinders,and means mounted on the cylinder having the knife and actuated by asurface rotating with the other cylinder for operating said knife tosever a web. I

MICHAEL MAHON.

